Young founded AC/DC in November 1973 and soon asked Angus to join when they were 20 and 18 years old respectively.

They began national touring in 1974 with singer Dave Evans

Malcolm is survived by his wife O’Linda and two children.

The Young Brothers are Malcolm Young (left) with Angus Young (right) and older brother and former Easybeats member George Young (centre). Picture: FacebookSource:Facebook

His death comes just weeks after his brother George Young, guitarist for the Easybeats and AC/DC producer, died at age 70.

Tributes started pouring in from around the world, both from the music industry and elsewhere.

RIP Malcolm YoungLegend.He was the founding member of AC/DC & the engine that roared behind the most powerful band in the world.He wrote Back In Black, Highway to Hell, You Shook Me All Night Long, Highway to Hell, so many songs...Travel safely to the stars, Malcolm.Legend. pic.twitter.com/xfjylBbh4u

It is a sad day in rock and roll. Malcolm Young was my friend and the heart and soul of AC/DC. I had some of the best times of my life with him on our 1984 European tour. He will be missed and my deepest condolences to his family, bandmates and friends.

We are deeply saddened to have heard the news of the passing of Malcolm Young from AC/DC. Malcolm was the heart and soul of AC/DC and as fine an example as any to rhythm guitarists everywhere. Rock In Peace, Malcolm. Hope we see you up there. Love Dropkick Murphys pic.twitter.com/qCWxmjmKEQ

While most of the world goes on with the day, many of us are mourning the loss of the great #malcolmyoung . I can’t tell you how much joy he and @acdc have brought me. This is a legend, a real legend.lets all remember him not just today but every day 💜 Mal Rules!! pic.twitter.com/22vGOLfKBz